`eks.duolingo.com`

DNSSEC	⚠️ Not signed
A	23.22.119.55^{🇺🇸 Amazon23.22.0.0/15 EC2 IAD prefix}
		PTR	`ec2-23-22-119-55.compute-1.amazonaws.com`
A	52.45.171.146^{🇺🇸 Amazon52.44.0.0/15 EC2 Region prefix}
A	54.243.145.14^{🇺🇸 Amazon54.242.0.0/15 EC2 IAD prefix}

`duolingo.com`

	DNSSEC	⚠️ Not signed
	A	23.22.119.55^{🇺🇸 Amazon23.22.0.0/15 EC2 IAD prefix}
	A	52.45.171.146^{🇺🇸 Amazon52.44.0.0/15 EC2 Region prefix}
	A	54.243.145.14^{🇺🇸 Amazon54.242.0.0/15 EC2 IAD prefix}
	NS	`ns-1020.awsdns-63.net` ⭐
	NS	`ns-1117.awsdns-11.org`
	NS	`ns-1904.awsdns-46.co.uk`
	NS	`ns-247.awsdns-30.com`
	MX	`aspmx.l.google.com` ⭐
	MX	`alt1.aspmx.l.google.com`⁽²⁰⁾
	MX	`alt2.aspmx.l.google.com`⁽²⁰⁾
	MX	`aspmx2.googlemail.com`⁽³⁰⁾
	MX	`aspmx3.googlemail.com`⁽³⁰⁾
	MX	`aspmx4.googlemail.com`⁽³⁰⁾
	MX	`aspmx5.googlemail.com`⁽³⁰⁾
	TXT	`MS=ms66530579`
	TXT	`_vg2bua41v8x489g1y55hg3hr4h3qmj0`
	TXT	`aliyun-site-verification=1acfc148-50be-45c8-a021-3c933fc8eff9`
	TXT	`amazonses:+SIz2NZPqYri3C+PSIyKShZIbuI4rNpbLlES7lmvpu4=`
	TXT	`anthropic-domain-verification-z4335b=YssTBALPY7K784Sri4FjVHjd3`
	TXT	`apple-domain-verification=bMPI889zOgALUenN`
	TXT	`atlassian-sending-domain-verification=423a5faf-1cfa-4704-a38a-f7adae302dd6`
	TXT	`docker-verification=b4ead4c5-fd66-42a5-a684-8f2e7f4c1417`
	TXT	`e622flctk14s3cs3ccdauh8uth`
	TXT	`google-site-verification=975UaH3lkKONB88HjWDDg34p8cdCqyTVSq_KGBAXrmU`
	TXT	`h1-domain-verification=sjPBeaGqQwEe8YhJ3W8JVNJa7WDQFAzc6AHkURoErkh324Yy`
	TXT	`jetbrains-domain-verification=bt8q7duih10l9pmf5fo5yy8wf`
	TXT	`klaviyo-site-verification=RKdcF3`
	TXT	`klaviyo-site-verification=TGmZS7`
	TXT	`openai-domain-verification=dv-A4cFxdrYIEodfG6UiQU0qxnT`
	TXT	`openai-domain-verification=dv-ieCpefZUqvVQwb8f7o4SlFye`
	TXT	`pardot_208162_*=610bfb45f202232a79db94c298b30d14332a62a6894e695b025fa7949d7b03fa`
	TXT	`pardot_208162_*=c15d5cb1b9f31e26058e1f30bda9e5d65c57cfeea37b34af8e1dd88474460e90`
	TXT	`rippling-domain-verification=9692f0635321f04d`
	TXT	`slack-domain-verification=iuNWYimCCkEpnistAJvWc4YOZF8izoZ23TCDek0I`
	TXT	`spacelift-domain-verification=519xtPXm`
	TXT	`v=spf1 ip4:100.25.59.11 ip4:205.201.128.0/20 ip4:198.2.128.0/18 ip4:148.105.8...`
	SOA	`ns-1020.awsdns-63.net`awsdns-hostmaster@amazon.com serial=1

WOT: SAFE (94/100)
rank #1109 globally
rank #615 in the tld
WOT: SAFE (94/100)
📈 Tranco rank: #450

Duolingo is the world's most popular language learning platform, founded in 2011 by Luis von Ahn and Severin Hacker. With over 500 million registered users, Duolingo has made language learning accessible through gamification. The company went public in 2021.

The platform offers courses in over 40 languages through a game-like interface with lessons, streaks, and leaderboards. Duolingo has expanded into Duolingo English Test and Duolingo Math.

Duolingo's infrastructure handles millions of daily lessons with sophisticated adaptive learning algorithms and extensive A/B testing.

DNS for duolingo.com uses Amazon Route 53 with global distribution. The platform's mobile apps and web interface are optimized for diverse network conditions.

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DNS History

64 records (3 active, 61 former)

○A100.29.244.542026-02-24 → 2026-02-27 · 5 obs

○ 2026-02-24 09:12:48
● 2026-02-24 19:57:56
● 2026-02-27 03:28:38
○ 2026-02-28 09:35:32
○ 2026-03-25 21:20:16

○A100.30.104.1332026-02-22 → 2026-02-22 · 4 obs

○ 2026-02-21 12:46:36
● 2026-02-22 00:42:14
○ 2026-02-23 09:52:50
○ 2026-03-25 21:20:16

○A100.48.169.442026-02-14 → 2026-02-16 · 4 obs

● 2026-02-14 21:58:56
● 2026-02-16 02:56:46
○ 2026-02-17 16:39:14
○ 2026-03-25 21:20:16

○A100.50.118.202026-02-20 → 2026-02-20 · 4 obs

○ 2026-02-19 08:39:22
● 2026-02-20 09:02:06
○ 2026-02-21 12:46:36
○ 2026-03-25 21:20:16

○A107.20.167.902026-02-24 → 2026-02-24 · 4 obs

○ 2026-02-24 09:12:48
● 2026-02-24 19:57:56
○ 2026-02-24 21:14:16
○ 2026-03-25 21:20:16

○A107.21.248.1752026-02-14 → 2026-02-16 · 4 obs

● 2026-02-14 21:58:56
● 2026-02-16 02:56:46
○ 2026-02-17 16:39:14
○ 2026-03-25 21:20:16

○A107.23.69.2422026-02-19 → 2026-02-19 · 5 obs

○ 2026-02-18 19:43:26
● 2026-02-19 06:44:20
● 2026-02-19 08:39:22
○ 2026-02-20 09:02:06
○ 2026-03-25 21:20:16

○A13.216.141.1822026-02-20 → 2026-02-21 · 5 obs

○ 2026-02-19 08:39:22
● 2026-02-20 09:02:06
● 2026-02-21 12:46:36
○ 2026-02-22 00:42:14
○ 2026-03-25 21:20:16

○A174.129.37.242026-03-04 → 2026-03-05 · 5 obs

○ 2026-03-03 19:44:48
● 2026-03-04 23:54:32
● 2026-03-05 11:18:34
○ 2026-03-06 03:48:58
○ 2026-03-25 21:20:16

○A18.208.119.1942026-03-14 → 2026-03-17 · 5 obs

○ 2026-03-14 22:18:44
● 2026-03-14 23:12:02
● 2026-03-17 10:30:52
○ 2026-03-17 17:11:52
○ 2026-03-25 21:20:16

○A18.213.96.2252026-02-28 → 2026-03-03 · 5 obs

○ 2026-02-27 03:28:38
● 2026-02-28 09:35:32
● 2026-03-03 19:44:48
○ 2026-03-04 23:54:32
○ 2026-03-25 21:20:16

○A18.235.253.1372026-03-14 → 2026-03-14 · 4 obs

○ 2026-03-14 13:06:24
● 2026-03-14 22:18:44
○ 2026-03-14 23:12:02
○ 2026-03-25 21:20:16

○A184.72.253.1192026-03-06 → 2026-03-06 · 5 obs

○ 2026-03-05 11:18:34
● 2026-03-06 03:48:58
● 2026-03-06 10:15:46
○ 2026-03-08 21:37:40
○ 2026-03-25 21:20:16

○A23.20.99.2162026-03-06 → 2026-03-06 · 5 obs

○ 2026-03-05 11:18:34
● 2026-03-06 03:48:58
● 2026-03-06 10:15:46
○ 2026-03-08 21:37:40
○ 2026-03-25 21:20:16

●A23.22.119.552026-03-21 → 2026-03-25 · 3 obs

○ 2026-03-17 17:11:52
● 2026-03-21 00:26:04
● 2026-03-25 21:20:16

○A3.208.236.2262026-02-17 → 2026-02-18 · 5 obs

○ 2026-02-16 02:56:46
● 2026-02-17 16:39:14
● 2026-02-18 03:55:08
○ 2026-02-18 19:43:26
○ 2026-03-25 21:20:16

○A3.209.142.792026-03-03 → 2026-03-03 · 4 obs

○ 2026-03-03 02:55:34
● 2026-03-03 19:44:48
○ 2026-03-04 23:54:32
○ 2026-03-25 21:20:16

○A3.216.37.2262026-02-22 → 2026-02-22 · 4 obs

○ 2026-02-21 12:46:36
● 2026-02-22 00:42:14
○ 2026-02-23 09:52:50
○ 2026-03-25 21:20:16

○A3.221.97.2032026-03-16 → 2026-03-21 · 9 obs

○ 2026-03-16 00:55:28
● 2026-03-16 08:43:28
● 2026-03-16 16:11:42
○ 2026-03-17 05:44:16
○ 2026-03-17 10:30:52
● 2026-03-17 17:11:52
● 2026-03-21 00:26:04
○ 2026-03-22 14:41:46
○ 2026-03-25 21:20:16

○A3.230.181.1332026-02-18 → 2026-02-18 · 4 obs

○ 2026-02-18 03:55:08
● 2026-02-18 19:43:26
○ 2026-02-19 06:44:20
○ 2026-03-25 21:20:16

○A34.192.28.712026-03-08 → 2026-03-09 · 5 obs

○ 2026-03-06 10:15:46
● 2026-03-08 21:37:40
● 2026-03-09 03:53:52
○ 2026-03-09 19:17:18
○ 2026-03-25 21:20:16

○A34.193.238.1512026-02-18 → 2026-02-18 · 4 obs

○ 2026-02-18 03:55:08
● 2026-02-18 19:43:26
○ 2026-02-19 06:44:20
○ 2026-03-25 21:20:16

○A34.193.4.1452026-03-25 → 2026-03-25 · 4 obs

○ 2026-03-24 17:26:00
● 2026-03-25 01:59:28
○ 2026-03-25 14:04:36
○ 2026-03-25 21:20:16

○A34.197.186.2352026-03-09 → 2026-03-10 · 5 obs

○ 2026-03-09 03:53:52
● 2026-03-09 19:17:18
● 2026-03-10 05:32:36
○ 2026-03-10 09:33:50
○ 2026-03-25 21:20:16

○A34.197.46.1562026-02-21 → 2026-02-21 · 4 obs

○ 2026-02-20 09:02:06
● 2026-02-21 12:46:36
○ 2026-02-22 00:42:14
○ 2026-03-25 21:20:16

○A34.197.77.2092026-02-18 → 2026-02-18 · 4 obs

○ 2026-02-18 03:55:08
● 2026-02-18 19:43:26
○ 2026-02-19 06:44:20
○ 2026-03-25 21:20:16

○A34.199.217.1782026-03-08 → 2026-03-12 · 5 obs

○ 2026-03-06 10:15:46
● 2026-03-08 21:37:40
● 2026-03-12 18:22:10
○ 2026-03-14 01:15:32
○ 2026-03-25 21:20:16

○A34.207.46.2102026-02-24 → 2026-02-24 · 4 obs

○ 2026-02-23 09:52:50
● 2026-02-24 09:12:48
○ 2026-02-24 19:57:56
○ 2026-03-25 21:20:16

○A34.225.199.1692026-02-21 → 2026-02-21 · 4 obs

○ 2026-02-20 09:02:06
● 2026-02-21 12:46:36
○ 2026-02-22 00:42:14
○ 2026-03-25 21:20:16

○A34.230.251.2552026-03-14 → 2026-03-14 · 5 obs

○ 2026-03-12 18:22:10
● 2026-03-14 01:15:32
● 2026-03-14 22:18:44
○ 2026-03-14 23:12:02
○ 2026-03-25 21:20:16

○A34.231.233.12026-02-20 → 2026-02-20 · 4 obs

○ 2026-02-19 08:39:22
● 2026-02-20 09:02:06
○ 2026-02-21 12:46:36
○ 2026-03-25 21:20:16

○A34.234.44.1242026-03-05 → 2026-03-05 · 4 obs

○ 2026-03-04 23:54:32
● 2026-03-05 11:18:34
○ 2026-03-06 03:48:58
○ 2026-03-25 21:20:16

○A34.237.159.812026-02-14 → 2026-03-25 · 2 obs

○ 2026-02-14 21:58:56
○ 2026-03-25 21:20:16

○A44.198.221.522026-02-22 → 2026-02-23 · 5 obs

○ 2026-02-21 12:46:36
● 2026-02-22 00:42:14
● 2026-02-23 09:52:50
○ 2026-02-24 09:12:48
○ 2026-03-25 21:20:16

○A44.208.78.1912026-02-24 → 2026-02-26 · 5 obs

○ 2026-02-24 09:12:48
● 2026-02-24 19:57:56
● 2026-02-26 11:09:52
○ 2026-02-26 23:00:16
○ 2026-03-25 21:20:16

○A44.214.70.122026-02-18 → 2026-02-18 · 4 obs

○ 2026-02-18 03:55:08
● 2026-02-18 19:43:26
○ 2026-02-19 06:44:20
○ 2026-03-25 21:20:16

○A44.215.37.1642026-02-24 → 2026-02-24 · 4 obs

○ 2026-02-23 09:52:50
● 2026-02-24 09:12:48
○ 2026-02-24 19:57:56
○ 2026-03-25 21:20:16

○A44.219.45.102026-03-16 → 2026-03-21 · 5 obs

○ 2026-03-15 12:57:54
● 2026-03-16 00:55:28
● 2026-03-21 00:26:04
○ 2026-03-22 14:41:46
○ 2026-03-25 21:20:16

○A50.16.239.2232026-02-22 → 2026-02-23 · 5 obs

○ 2026-02-21 12:46:36
● 2026-02-22 00:42:14
● 2026-02-23 09:52:50
○ 2026-02-24 09:12:48
○ 2026-03-25 21:20:16

○A52.1.2.592026-03-04 → 2026-03-05 · 5 obs

○ 2026-03-03 19:44:48
● 2026-03-04 23:54:32
● 2026-03-05 11:18:34
○ 2026-03-06 03:48:58
○ 2026-03-25 21:20:16

○A52.204.230.82026-02-17 → 2026-02-18 · 5 obs

○ 2026-02-16 02:56:46
● 2026-02-17 16:39:14
● 2026-02-18 03:55:08
○ 2026-02-18 19:43:26
○ 2026-03-25 21:20:16

○A52.22.161.2152026-02-19 → 2026-02-19 · 5 obs

○ 2026-02-18 19:43:26
● 2026-02-19 06:44:20
● 2026-02-19 08:39:22
○ 2026-02-20 09:02:06
○ 2026-03-25 21:20:16

○A52.22.249.1022026-02-24 → 2026-02-26 · 5 obs

○ 2026-02-24 09:12:48
● 2026-02-24 19:57:56
● 2026-02-26 11:09:52
○ 2026-02-26 23:00:16
○ 2026-03-25 21:20:16

○A52.3.197.92026-03-08 → 2026-03-11 · 5 obs

○ 2026-03-06 10:15:46
● 2026-03-08 21:37:40
● 2026-03-11 04:58:54
○ 2026-03-12 04:56:16
○ 2026-03-25 21:20:16

○A52.4.205.1782026-02-26 → 2026-03-03 · 7 obs

○ 2026-02-26 11:09:52
● 2026-02-26 23:00:16
● 2026-03-02 16:14:36
○ 2026-03-03 02:55:34
● 2026-03-03 19:44:48
○ 2026-03-04 23:54:32
○ 2026-03-25 21:20:16

●A52.45.171.1462026-03-25 → 2026-03-25 · 2 obs

○ 2026-03-25 15:43:22
● 2026-03-25 21:20:16

○A52.5.179.2292026-02-26 → 2026-02-26 · 4 obs

○ 2026-02-26 11:09:52
● 2026-02-26 23:00:16
○ 2026-02-27 03:28:38
○ 2026-03-25 21:20:16

○A52.54.221.2242026-02-23 → 2026-02-23 · 4 obs

○ 2026-02-22 00:42:14
● 2026-02-23 09:52:50
○ 2026-02-24 09:12:48
○ 2026-03-25 21:20:16

○A52.70.243.682026-03-10 → 2026-03-14 · 5 obs

○ 2026-03-10 05:32:36
● 2026-03-10 09:33:50
● 2026-03-14 22:18:44
○ 2026-03-14 23:12:02
○ 2026-03-25 21:20:16

○A52.91.116.1122026-03-24 → 2026-03-24 · 5 obs

○ 2026-03-24 03:32:32
● 2026-03-24 11:56:44
● 2026-03-24 17:26:00
○ 2026-03-25 01:59:28
○ 2026-03-25 21:20:16

○A54.152.92.742026-03-14 → 2026-03-23 · 5 obs

○ 2026-03-14 22:18:44
● 2026-03-14 23:12:02
● 2026-03-23 14:07:40
○ 2026-03-24 03:32:32
○ 2026-03-25 21:20:16

○A54.159.43.02026-02-19 → 2026-02-19 · 5 obs

○ 2026-02-18 19:43:26
● 2026-02-19 06:44:20
● 2026-02-19 08:39:22
○ 2026-02-20 09:02:06
○ 2026-03-25 21:20:16

○A54.162.178.2532026-02-14 → 2026-03-25 · 2 obs

○ 2026-02-14 21:58:56
○ 2026-03-25 21:20:16

○A54.166.202.952026-03-25 → 2026-03-25 · 4 obs

○ 2026-03-24 17:26:00
● 2026-03-25 01:59:28
● 2026-03-25 15:43:22
○ 2026-03-25 21:20:16

○A54.172.165.72026-02-17 → 2026-02-18 · 5 obs

○ 2026-02-16 02:56:46
● 2026-02-17 16:39:14
● 2026-02-18 03:55:08
○ 2026-02-18 19:43:26
○ 2026-03-25 21:20:16

○A54.172.179.2452026-03-09 → 2026-03-09 · 4 obs

○ 2026-03-09 03:53:52
● 2026-03-09 19:17:18
○ 2026-03-10 03:38:08
○ 2026-03-25 21:20:16

○A54.174.29.882026-03-14 → 2026-03-15 · 5 obs

○ 2026-03-14 22:18:44
● 2026-03-14 23:12:02
● 2026-03-15 12:57:54
○ 2026-03-16 00:55:28
○ 2026-03-25 21:20:16

○A54.204.235.252026-03-12 → 2026-03-14 · 5 obs

○ 2026-03-11 04:58:54
● 2026-03-12 04:56:16
● 2026-03-14 13:06:24
○ 2026-03-14 22:18:44
○ 2026-03-25 21:20:16

○A54.209.23.1422026-03-03 → 2026-03-03 · 4 obs

○ 2026-03-02 16:14:36
● 2026-03-03 02:55:34
○ 2026-03-03 19:44:48
○ 2026-03-25 21:20:16

○A54.211.43.942026-03-06 → 2026-03-06 · 5 obs

○ 2026-03-05 11:18:34
● 2026-03-06 03:48:58
● 2026-03-06 10:15:46
○ 2026-03-08 21:37:40
○ 2026-03-25 21:20:16

●A54.243.145.142026-03-23 → 2026-03-25 · 3 obs

○ 2026-03-22 14:41:46
● 2026-03-23 04:14:32
● 2026-03-25 21:20:16

○A54.80.134.2182026-02-26 → 2026-03-02 · 5 obs

○ 2026-02-26 11:09:52
● 2026-02-26 23:00:16
● 2026-03-02 16:14:36
○ 2026-03-03 02:55:34
○ 2026-03-25 21:20:16

○A54.92.254.1672026-03-24 → 2026-03-24 · 4 obs

○ 2026-03-23 14:07:40
● 2026-03-24 03:32:32
○ 2026-03-24 11:56:44
○ 2026-03-25 21:20:16

○A98.95.57.662026-02-14 → 2026-02-16 · 4 obs

● 2026-02-14 21:58:56
● 2026-02-16 02:56:46
○ 2026-02-17 16:39:14
○ 2026-03-25 21:20:16

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
duolingo.com	ns-247.awsdns-30.com, ns-1020.awsdns-63.net, ns-1117.awsdns-11.org, ns-1904.awsdns-46.co.uk	1 record

✅ Authoritative Response

Server:205.251.196.93

NS records: ns-247.awsdns-30.com, ns-1020.awsdns-63.net, ns-1117.awsdns-11.org, ns-1904.awsdns-46.co.uk

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for duolingo.com (unsigned zone)

⏱️ Timing

Total: 399ms | Queries: -

📄 Records

Type	Count	Sample Data
A	3	`54.243.145.14, 52.45.171.146...`

📌 Glue Records Collected

Total: 1

Out-of-bailiwick: 1 (ns-247.awsdns-30.com)

Analysis

IP Addresses

Three IP numbers for eks.duolingo.com are 23.22.119.55, 52.45.171.146 and 54.243.145.14.

Other host names, for instance compute.duolingo.com, cefr-tool-api.duolingo.com, imdb.comforums.newtek.comforums.macrumors.comanswers.sap.comforum.duolingo.com, comstatic.duolingo.com and comwww.tripadvisor.comwww.imdb.comforums.newtek.comforums.macrumors.comanswers.sap.comforum.duolingo.com share IP numbers with eks.duolingo.com.

eks.duolingo.com - robtex.com

eks.duolingo.com

duolingo.com

Same first word

Similar names

DNS History

🔍 DNS Trace

📋 Delegation Chain

✅ Authoritative Response

🔒 DNSSEC Status

⏱️ Timing

📄 Records

📌 Glue Records Collected

Analysis

IP Addresses

`eks.duolingo.com`

`duolingo.com`